Yellowstone National Park

wildlife nature wildlife photography nature photography landscape yellowstone yellowstone national park forest service national park service park employees Bull elk Mammoth Hot Springs Yellowstone National Park Jason Whitman NurPhoto wildlife elk sighting October 2026 national park photography nature wildlife photography hot springs Mammoth Yellowstone wildlife observation animal behavior elk behavior park visit environmental photography natural habitat conservation wildlife conservation outdoor photography elk habitat nature reserve public lands wildlife management protected area park wildlife scenic photography.